Carpet weaving looms of the type provided with a wire motion



July 3, 1956 A. F. CRAIG 2,752,954

CARPET WEAVING LOOMS OF THE TYPE PROVIDED WITH A WIRE MOTION Filed Nov. 13. 1953 6 Sheets-Sheet l 3? 3, 1956 A. F. CRAIG 2,,752,95

CARPET WEAVING LOOMS OP THE TYPE PROVIDED WITH A WIRE MOTION 6 Sheets-Sheet 2 Filed NOV. 15. 1953 July 3, 1956 A. F. CRAIG 2,752,954

CARPET WEAVING LOOMS OF THE TYPE PROVIDED WITH A WIRE MOTION 6 Sheets-Sheet 5 Filed Nov. 13, 1953 July 3. 1956 A F CRAlG 2,752,954

CARPET WEAViNG LOOMS OF THE TYPE PROVIDED WITH A WIRE MOTION Filed NOV. 15, 1953 6 Sheets-Sheet 4 July 3. 1956 VA. F. CRAIG 2,752,954

CARPET WEAVING LOOMS OF THE TYPE PROVIDED WITH A WIRE MOTION Filed Nov. 13. 1953 6 Sheets-Sheet 5 0 \H o o \o H o l .ji 0 9 l9. 91 J] 51 EJ m fl A 4 g ILL. @192 W I E 22' i"* g k m 0 [Li llOl Jl/ Jl\ P 15 Z5 3 iDZUiZY/ZOfi July 3. 1956 A. F. CRAIG CARPET WEAVING LOUMS OF THE TYPE PROVIDED WITH A WIRE MOTION 6 Sheets-Sheet 6 Filed NOV. 15, 1953 United States Patent CARPET WEAVING LOOMS OF THE TYPE PRO- VIDED WITH A WIRE MOTION Archibald F. Craig, Paisley, Scotland, assignor to A. F. Craig & Company Limited, Paisley, Scotland This invention has reference to carpet Weaving looms of the type provided with a wire motion.

Two weaves of carpets are Woven by such looms, namely a two shot Weave and a three shot weave. p

In weaving atwo shot carpet the pile yarn is raised once in every two picks of the Weft and the line chain warp threads remain open for the same two picks. In weaving a three'sho't carpet the said pile yarn is raised once in every three picks of the weft and the fine chain warp threads remain open for the same three picks.

The same loom is used for the production of both weaves of carpet but heretofore considerable labour and skill have been required in converting a loom which has been set for weaving a two shot carpet to weave a three shot carpet and vice versa.

The present invention has for itsobject to provide improvements whereby the conversion of a loom of the type set forth for two or three shot Weaving can be much more easily and quickly effected than has heretofore been the case.

The invention consists in a carpet weaving loom of the type set forth wherein the the introduction and withdrawal of the wires comprises a driving clutch member driven from the power shaft of the loom, alternative gears each provided with a driven clutch member and with either of which the driving member can be brought into engagement, an output shaft common to the alternative gears, a crank disc driven by said output shaft, a pivoted slotted lever, the crank pin working in the slot, a toothed quadrant rocked by said lever, a spur wheel meshing therewith, gearing by which the motion of the spur wheel is transmitted to a pulley and a flexible connection through which the motion of the pulley is transmitted to the wire carriage, one of said alternative gears comprising a train of spur Wheels which transmits through said slotted lever mechanism the required motion for a two shot weave and the other alternative gear including intermeshing elliptical gear wheels which, in combination with the slotted lever mechanism, gives the required motion to the wire carriage for a three shot weave.

During the movement of the wire carriage the latter is wire motion controlling guided by a fulcrurned guide which is turned about its fulcrum by the action of a cam, a second cam functioning to hold the wire in position as it is being inserted and withdrawn. A different cam movement is required for two and three shot weaves. The present invention therefore further consists in a carpet weaving loom as set forth in either of the preceding paragraphs having duplicate cams for controlling the movements of the guide and for holding the wire in position, alternative gears to drive the cams and means whereby either of the two gears may be selectively driven, one pair of cams and its gear being suitable for two shot Weaving and the other pair and its gear being suitable for three shot weaving.

A preferred embodiment of the invention will now be 2,752,954 Patented July 3, 1956 ICC described with reference to the annexed drawings, wherein: p y

Figures 1 and in are respectively an elevationof the left and right hand sides of a carpet weaving loom with wire motion for weaving a seamless Wilton or tapestry carpet, and means for controlling the entry and withdrawal'of the wires in accordance with the invention, only such parts of the loom being shown as are necessary for the understanding of the invention;

Figures 2 and 2a are respectively plan views of Figures 1 and 1a;

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4 is an elevation of the gear box containing the t alternative gears through which the entry and Withdrawal of the wires is effected;

Figure 5 is a plan view thereof with the top cover removed;

Figure 6 is a section on the line 6-6 of Figure 5;

Figure 7 isan end view thereof looking to the right; and

Figure 8 is a developed view of the gear train arrangemerit. r

The loom shown in the drawings is provided with a wire motion having a gear box 10, the input shaft 11 of which is driven by the shaft 12 to which is coupled the crank, not shown, by which the lay of the loom is driven. The shaft 12 is driven by a motor l2 through suitable intermediate gearing 12 The shaft 111 has mounted thereon a manually operable driving clutch member 13, see Figure 5, which can be brought into engagement with either of two driven clutch members 14 and 15 by theoperation of a hand lever 13 fast. on a spindle 13 to which is secured a yoke 13 connectedto the driving member. The driven member 15 drives through spur gearing 16, 16 16 and 16, the output shaft 1'7 of the gear box and the driving member 14 drives the same shaft 17 through spur gearing 18 and 18 and elliptical spur gearing 19 and 19 The said output shaft 1'7 drives a crank disc 18, see Figure 3, having a crank pin 19 fitted in a bush 20 which works in a slot 21 of a lever 22. fulcrumed at one end as at 23 to the main bed plate 24 of the loom. This lever 22 is connected by means of a connecting rod 25 to a toothed quadrant 26 pivoted at 27 to the main bed plate. A spur wheel 28 in mesh with the toothed quadrant drives through bevel gearing 23 and 28", see Figure 2, a shaft 28 on which is fast a pulley 29. To the pulley is anchored the two ends of a rope or the like 36 which passes over guide pulleys 30 30 and 38 and tension regulating pulley 30 and to which is secured a wire carrying carriage 31. The carriage is arranged to travel along a suitable guide 32 and insert and withdraw the wires.

In the production of two shot Wilton or tapestry carpets for each rotation of the picking crank shaft, not shown, there are two picks or shuttle movements. A wire is inserted in the shed formed by raising the pile yarn to form the pattern, this being done during the first pick and when the second pick is being effected a wire is withdrawn. The necessary movement is imparted to the wire carriage 31 by moving the driving clutch member 13 so that the drive is transmitted through the driven clutch member 15 and spur gearing 16, 16 16 and 16 to the output shaft 17. The latter in turn operates through the crank pin 19 slotted lever 22 and connecting rod 25 to rock the toothed quadrant 26 which, through the spur wheel 28 drives the pulley 29. The pulley through the flexible rope or the like 3i) then traverses the wire carrying carriage 31 first in one direction and then in the other, the carriage inserting the wire in the shed and withdrawing a Wire on its return movement.

When a three shot carpet is to be woven the required movement is one wire in for one pick and one wire out for two picks. This movement is obtained by operating the driving clutch member 13 so that the drive is then transmitted to the wire carrying carriage through the alternative gearing, i. e. through the spur wheels 18 and 18 and the elliptical spur gearing 19 and 19 and thereafter through slotted lever, quadrant and gearing above described.

The slide 32 is provided with a movable guide 34 fulcrumed at 35, see Figure 2a, such guide serving to guide the carriage 31. A finger 35 is provided to hold the wire in position as it is being inserted and withdrawn.

Both the guide and the finger are cam operated out a separate pair of cams is necessary for each of the two types of weaves.

As shown inthe drawings the guide towards its end remote from the fulcrum is connected by a rod 36 to the uper end of one arm 37 of a bell crank lever fulcrumed on a shaft 37 the other arm of the bell crank being provided with a roller 38.

The finger 35 by which the wire is retained against upward movement is connected by means of a connecting rod 40 to an arm 40 fast on the shaft 37 Also fast on this shaft is an arm 41 carrying a roller 42.

Fast on a shaft 43 supported on the bed plate by bearings 44 are two spur wheels 45 and 46 of different diameters, and'also two pairs of earns 47 and 47 and 48 and 48 Roller 38 can be caused to cooperate with either of the cams 47 and 47 and roller 42 can be caused to cooperate with either of the cams 48 and 48.

.A further shaft 50 mounted in bearings carried by the bed is driven by the shaft 12 through spur wheels 52 and 52 and mounted on this shaft 50 so as to be capable of axial adjustment but incapable of a relative rotary movement thereon is a pair of spur wheels53 and 54.

' When in the position shown spur wheel 53 meshes with spur wheel 45 to drive the four cams. Further in the position shown roller 38 co-operates with the cam 47 and roller 42 co-operates with the cam 48. The spur wheels 53 and 45 and the formation of the cams 47 and 48 are such that when the drive is transmitted thereby to the cams through said spur wheels the guide 34 is turned about its fulcrum and the finger actuated to meet the requirements in three shot weaving, cam 47 operating the guide through the bell crank lever and rod 36 connecting the arm 37 of said lever and cam 43 operating the finger through the arms 41 and connecting rod 40.

By moving the spur wheels 53 and S4 axially the drive can be transmitted through spur wheels 54 and 46 and by removing the rollers and replacing them so that they engage with the cams 47 and 48 respectively the movements imparted to the guide and finger are such as will meet the requirements in two shot weaving, it being understood that the diameters of said spur wheels and the formation of the cams are such as will give the requisite movements to the guide and finger.

it will therefore be appreciated that if the loom is set for two shot weaving it can be easily and quickly converted for three shot weaving and vice versa.

What is claimed is:

1. A carpet weaving loom of the type set forth having a wire motion including a wire carriage wherein the wire motion controlling the introduction and withdrawal of the wires comprises a driving clutch member driven from the power shaft of the loom, alternative gears each provided with a driven clutch member, manually operable means by which the driving clutch member can be brought into engagement with either of the alternative gears, an output shaft common to the alternative gears, a crank pin driven by said output shaft, a pivoted slotted lever, the crank pin working in the slot, a toothed quadrant rocked by said lever, a spur wheel meshing with the toothed quadrant, a pulley and flexible connection being connected to the wire carriage of the wire motion, and gearing by which the motion of said spur wheel is transmitted to the said pulley, one of said alternative gears comprising a train of spur wheels which transmits through said slotted lever mechanism the required motion for a two shot weave and the other alternative gears including intermeshing elliptical gear wheels which, in combination with the slotted lever mechanism, gives the required motion to the wire carriage for a three shot weave.

2. A carpet weaving loom as claimed in claim 1 having a guide in which the carriage travels, means for holding in position the wire carried by carriage, duplicate cams for controlling the movement of the guide and for controlling the wire holding means, alternative gears to drive the cams and means whereby either of the two gears may be selectively driven, one pair of cams and its gear being suitable for two shot weaving and the other pair and its gear being suitable for three shot weaving.

References Cited in the file of this patent UNITED STATES PATENTS 1,771,662 Stone July 29, 1930 

